The perfectly square block of rice that results when you turn a box of rice from a bad chinese food place upside-down and let it slide out onto your plate.
"Dude, that rice is awful, it came out as a riceberg from the box!"
by robotrock February 11, 2008
1 more definition
Leaving rice in the fridge and it gets cold to where it clumps together to a solid form
I was eating my leftover Chinese earlier and I had to stir up my rice cause it was a riceberg
by x5mithx July 15, 2010